Retirement Plans (Schedule of Amounts Recognized in Statement of Financial Position) (Details) - USD ($) $ in Thousands	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2020
Retirement Benefits [Abstract]
Other current liabilities	$ 530	$ 530
Other non-current liabilities	4,892	5,754
Net amount recognized	$ 5,422	$ 6,284	$ 6,904

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant